adj. unwarrantable ; ill-founded ; unprovoked
莎莉，你讽刺她是无正当理由的。
无正当理由的缺课者可能要受到停发津贴的处罚。
An absence without adequate excuse could result in the suspension of a financial stipend .
监察机关依法提出的监察建议，有关部门无正当理由的，应当采纳。
A supervisory recommendation made by a supervisory organ in accordance with law shall be adopted by the departments concerned, unless they have justifiable reasons not to do so.
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